Hostname
wa.cz
Last fetched
wa.cz resolves to 1 IPv4 address operated by AS39790 in CZ. WHOIS lists registrar:reg-web4u as the registrar.
Nutrition Label
Resolution chain
wa.cz resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.
| IP | Prefix | ASN | Operator | Country |
|---|---|---|---|---|
| 81.91.84.138 | 81.91.80.0/21 | AS39790 | — | CZ |
WHOIS identity
- Registrar
- registrar:reg-web4u
- Organization
- jan cepelak
- Contact emails
Subdomains
68 observed subdomains of wa.cz.
Showing 25 of 68. View all subdomains →
Web-graph footprint
Distinct hostnames that link to or from wa.cz in the public web crawl.
137 sites link to this hostname.
23 sites linked to from this hostname.
Sample inbound links
Threat posture
History
Mail and authentication
MX records
SPF policy
11 SPF mechanisms authorising senders for wa.cz.
| Mechanism | Target |
|---|---|
| SPF_A | wa.cz |
| SPF_IP | 2001:1568:502::/48 |
| SPF_IP | 2001:1568::/64 |
| SPF_IP | 81.91.80.0/20 |
| SPF_IP | 81.91.82.114 |
| SPF_IP | 81.91.84.138 |
| SPF_IP | 81.91.84.141 |
| SPF_IP | 81.91.84.147 |
| SPF_IP | 81.91.85.70 |
| SPF_IP | 81.91.85.71 |
| SPF_MX | wa.cz |
Related pages
Pivot deeper into the graph from wa.cz.
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "wa.cz"})-[:RESOLVES_TO]->(ip:IPV4)
-[:ANNOUNCED_BY]->(ap:ANNOUNCED_PREFIX)
-[:ROUTES]->(asn:ASN)-[:HAS_NAME]->(n:ASN_NAME)
RETURN ip.name AS ip, ap.name AS prefix, asn.name AS asn, n.name AS operator
LIMIT 20Or query Whisper from your own LLM workflow via the Whisper MCP server.